How to use format() on a moment.js duration?
// set uplet start = moment("2018-05-16 12:00:00"); // some random moment in time (in ms)let end = moment("2018-05-16 12:22:00"); // some random moment after start (in ms)let diff = end.diff(start);// executionlet f = moment.utc(diff).format("HH:mm:ss.SSS");alert(f);
convert duration to ms and then to moment:
moment.utc(duration.as('milliseconds')).format('HH:mm:ss')
We are looking into adding some kind of formatting to durations in moment.js. See https://github.com/timrwood/moment/issues/463
A couple other libraries that might help out are http://countdownjs.org/ and https://github.com/icambron/twix.js